40354868430497 has 2 divisors, whose sum is σ = 40354868430498. Its totient is φ = 40354868430496.

The previous prime is 40354868430473. The next prime is 40354868430533. The reversal of 40354868430497 is 79403486845304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38440508401681 + 1914360028816 = 6200041^2 + 1383604^2 .

It is a cyclic number.

It is not a de Polignac number, because 40354868430497 - 2¹² = 40354868426401 is a prime.

It is not a weakly prime, because it can be changed into another prime (40354868430407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177434215248 + 20177434215249.

It is an arithmetic number, because the mean of its divisors is an integer number (20177434215249).

Almost surely, 2^{40354868430497} is an apocalyptic number.

It is an amenable number.

40354868430497 is a deficient number, since it is larger than the sum of its proper divisors (1).

40354868430497 is an equidigital number, since it uses as much as digits as its factorization.

40354868430497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 278691840, while the sum is 65.

The spelling of 40354868430497 in words is "forty trillion, three hundred fifty-four billion, eight hundred sixty-eight million, four hundred thirty thousand, four hundred ninety-seven".